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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4265) BKJM doesn't take advantage of speculative reads
Date Sat, 14 Feb 2015 14:09:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321436#comment-14321436
] 

Hudson commented on HDFS-4265:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk #2036 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/2036/])
HDFS-4265. BKJM doesn't take advantage of speculative reads. Contributed by Rakesh R. (aajisaka:
rev 0d521e33262193e6cf709deaa69a54811a97ef6a)
* hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/test/java/org/apache/hadoop/contrib/bkjournal/TestBookKeeperSpeculativeRead.java


> BKJM doesn't take advantage of speculative reads
> ------------------------------------------------
>
>                 Key: HDFS-4265
>                 URL: https://issues.apache.org/jira/browse/HDFS-4265
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: 2.2.0
>            Reporter: Ivan Kelly
>            Assignee: Rakesh R
>             Fix For: 2.7.0
>
>         Attachments: 0005-HDFS-4265.patch, 0006-HDFS-4265.patch, 0007-HDFS-4265.patch,
0009-HDFS-4265.patch, 001-HDFS-4265.patch, 002-HDFS-4265.patch, 003-HDFS-4265.patch, 004-HDFS-4265.patch
>
>
> BookKeeperEditLogInputStream reads entry at a time, so it doesn't take advantage of the
speculative read mechanism introduced by BOOKKEEPER-336.



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